Which statement is true for all minerals? A. They have a crystalline structure. B. They contain useful metals. C. They are made of silicon and oxygen. D. They are too hard to be scratched with a nail.

(2) Answers

All minerals have a crystalline structure. They are naturally occurring substances that are usually inorganic and solid and have a crystal structure. Thus, the answer is letter A. The crystalline structure of minerals have contributed to their stability. 


They ALL have a set structure and is definitely a requirement for a mineral. It has to be there for the mineral to be a mineral. So option A is the best. A. They have a crystalline structure.

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